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Investigation on the optimum copper plate placement for traditional Japanese-style Shake roof

Research Project

Project/Area Number 18K01089
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 03060:Cultural assets study-related
Research InstitutionKyoto University

Principal Investigator

Fujiwara Yuko  京都大学, 農学研究科, 研究員 (60506088)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywordsこけら葺屋根 / 葺込銅板 / 銅元素量 / 葺込銅板の配置 / 銅元素分布 / 生物劣化 / 銅元素 / 腐朽 / 損耗 / こけら葺 / 銅板 / 劣化 / 耐久性
Outline of Final Research Achievements

The present research investigated the effect of roof slope and setback distance for inserted copper plates on the distribution of copper elements on traditional Japanese-style shake roof models exposed to the outdoors for about 2 years. Copper elements were detected earlier and accumulated in greater amounts in models with gentle roof slopes and copper plates set closer to the eave-side edge. And this research also investigated the amount of copper elements on the exposed part of shakes in the shake roof 5 and 45 years after construction. The amount of copper elements was 1/3 to 1/2 of commercial preservative-treated wood in roofs 5 years old and equal or higher in roofs 45 years old. These results can be used to derive a predictive equation for copper distribution on the roof, which can then be used to determine the optimal placement of the copper plates.

Academic Significance and Societal Importance of the Research Achievements

こけら葺屋根が次の葺替えまで健全な状態を保つための工夫の一つとして葺込銅板が設置されているがその最適な配置は建物の立地や屋根の方位・形状等によって異なり,現場では試行錯誤が続いている。本研究では屋根勾配および銅板の配置の異なる屋根モデルについて銅元素付着量の経時変化を調べた他,施工年数の異なる実際の屋根の銅元素分布を明らかにした。これらの結果を利用して銅付着量の予測式を導出すれば葺込銅板の最適配置を決める一助となる。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (10 results)

All 2020 2019 2018

All Presentation (10 results) (of which Int'l Joint Research: 2 results)

  • [Presentation] 約5年間屋外暴露した葺込銅板のあるこけら葺屋根モデルの 劣化状態と銅元素分布2020

    • Author(s)
      藤原裕子, 藤井義久, 高妻洋成
    • Organizer
      文化財科学会年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 約5年間屋外暴露した葺込銅板のあるこけら葺屋根モデルの 劣化状態と銅元素分布2020

    • Author(s)
      藤原裕子,藤井義久,高妻洋成
    • Organizer
      日本文化財科学会第37回大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Biodegradation of traditional Japanese style shake roofs and preservative effect of copper plates on wooden shakes2019

    • Author(s)
      Yuko Fujiwara, Yousei Kozuma, Hitomi Nakano, Yoshihisa Fujii
    • Organizer
      the 4th international conference for Integrated Pest Management (IPM) for Cultural Heritage
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 葺込銅板のあるこけら葺屋根平葺面の銅元素分布 - 重要文化財 名草神社拝殿の例 -2019

    • Author(s)
      藤原裕子,藤井義久,中野ひとみ
    • Organizer
      日本文化財科学会第36回大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Biodegradation of traditional Japanese style shake roofs and preservative effect of copper plates on wooden shakes2019

    • Author(s)
      Yuko Fujiwara, Yousei Kouzuma, Hitomi Nakano, Yoshihisa Fujii
    • Organizer
      Integrated Pest Management (IPM) for Cultural Heritage
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 葺込銅板のあるこけら葺屋根平葺面の銅元素分布 -重要文化財 名草神社拝殿の例-2019

    • Author(s)
      藤原裕子,藤井義久,中野ひとみ
    • Organizer
      文化財科学会 2019
    • Related Report
      2018 Research-status Report
  • [Presentation] パターン認識による腐朽後乾燥したスギ辺材の腐朽程度推定2019

    • Author(s)
      篠﨑美帆、藤原裕子、簗瀬佳之、澤田豊、藤井義久、吉村剛
    • Organizer
      第69回 日本木材学会年次大会
    • Related Report
      2018 Research-status Report
  • [Presentation] レジストグラフを用いた腐朽木材の穿孔抵抗と密度および強度との関係2019

    • Author(s)
      藤原尚輝,簗瀬佳之,藤原裕子,藤井義久
    • Organizer
      第35回 日本木材保存協会年次大会
    • Related Report
      2018 Research-status Report
  • [Presentation] ハンドヘルド型蛍光X線分析装置を用いたこけら葺き屋根の銅元素の現場測定2018

    • Author(s)
      中野ひとみ、駒谷慎太郎、 藤原裕子、藤井義久
    • Organizer
      文化財科学会 2018
    • Related Report
      2018 Research-status Report
  • [Presentation] 腐朽後乾燥による木材細胞の配列乱れを示すCT画像の特徴量の抽出 ―特徴量の信頼性向上の試み―2018

    • Author(s)
      篠﨑美帆、藤原裕子、簗瀬佳之、澤田豊、藤井義久、吉村剛
    • Organizer
      第34回 日本木材保存協会年次大会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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